Auxiliary air inlet



March 3, 1936. c, WEINMANN ET AL AUXILIARY AIR INLET Filed Sept. 18, 1935 amlmi Curl 71 67711778777? Bwniij 14270000011 ATTOR N EY Patented Mar. 3, 1936 I UNITED STATES PATENT OFFICE AUXILIARY AIR INLET Curt Weinmann and Frank L. MacDonough, Brooklyn, N. Y.

Application September 18, 1933, Serial No. 689,990

Claims. (01. 123-97) Our invention relates to improvements in aux- The numeral 8 designa es the y, for iliary fuel control apparatus for internal combusstance, of a automobi e, a the generator tion engines of automobiles. C arging the battery- I As will be understood, when the accelerator of According to our invention a closed semi-cir- 5 a car is released the throttle valve of the carcular casing 9 is arranged, as by bolts l0 and buretor is left open to a sufiieient degree to pervfl ng s w en the ar r I an h mit idling of the engine. During deceleration of intake manifold I, at one side of the latter, said the engine to its idling speed an unnecessary in f rmiri a h m 9' c mmuni n wi amount of fuel is fed thereto. The result is the intake manifold 1 thru a p An incomplete combustion, fouling of cylinder walls a y Valve 0f the butterfly Variety, iS located and spark plugs and a waste of fuel and unnecin said manifold 1, below the port l2, said valve essary expense. having a valve stem |5 projecting into the cham- Having the foregoing in mind, the principal her 9' and rotatably mounted in any suitable object of our invention is to provide an efficient manner. A coil spring I6 is suitably arranged on apparatus for use in connection with the carthe valve stem |5 to yieldingly retain the valve I3 buretor of an internal combustion engine under in ope Position A radial blade Vane I7 is control of the usual accelerator mechanism and secured to the valve stem I5 within the chamber generator to shut off the feed of fuel from the 9' for a purpose presently apparent. carburetor when the accelerator is released and A solenoid I8 is mounted in the chamber 9, at during the ensuing deceleration of the engine to one S de Of the Va e y a hollow Screw bolt 29 20 its idling speed, and whereby the feed of the fuel and t 2 a bo t pa sin ru the wal o t e is again permitted when the engine has reached casing 9 and being aligned with the core 22 of its idling speed and automatically regulated to saidsolenoid. The latter is located so that the maintain the constant idling speed of the engine. outer end of the core forms a valve 23 movable The invention will be full and comprehenin opposite directions, respectively, to open and 25 sively understood from a co sideration of the close the port l2. A bore 24 in the bolt 20 admits following detailed description when read in conair toa passageway 25 in the solenoid. The nection with the accompanying drawing which inner 'end of the core 22 has a bore 25 communiforms part of the application, with the undereating with the passageway 25 and terminating standing, however, that the improvement is cain a relief port 28 arranged to open into the 30 pable of extended application and is not confined chamber 9' when said valve 23 is moved in a to the exact showing of the drawing nor to the direction to -close the port I2, said relief port precise construction described and, therefore, being closed when said valve is moved in the such changes and modifications may be made opposite direction. A disk 29 is fixed to valve 23.

therein as do not affect the spirit of the invention The valve 23 is moved in a direction to open 35 nor exceed the scope thereof as expressed in the the port |2 under the conjoint control of the appended claims. accelerator mechanism 5 and the generator 8 In the drawing: by the following means. A conductor 30 con- Fig. 1 is a perspective view of an apparatus nects the generator 8' to one side of a solenoid constructed in accordance with our invention, coil 3|, the other side of which is connected by 40 parts being broken away and shown in section; a conductor 32 to one side of the battery 3,'the and v other side of which is grounded as at 33. The

Fig.2 is a transverse vertical section, drawn solenoid 3| is designed to attract a resilient conto an enlarged scale, of a control valve forming tact 34 into engagement with a contact 35, said part of our apparatus. contacts forming a circuit making and breaking 45 Referring to the drawing, the numeral desigdevice grounded as at 36. One side of the solenates a carburetor having the usual float valve noid 3| is connected by a conductor 31 to the chamber 2, mixing chamber 3 and throttle valve conductor 32. The other side of said solenoid 4, the latter controlled by the usual accelerator 3| is connected by conductors 38 tothe beforemechanism including the pull rod connection 5 mentioned contact 35 and a circuit making and so and crank 6. Numeral 1 designates the usual breaking device 39 is arranged in this line of intake manifold for connection to an internal connection 40 on the pull rod 5 when the accelcombustion engine in a manner which needs no erator mechanism is released and to be opened description and therefore has not been illuswhen said mechanism is operated to increase the trated. speed of the engine. 55

Referring to the operation of our invention,

' under normal operating conditions the throttle valve 4 is in open position and the contact 4|.I is held away from the circuit breaker 39 by the accelerator draw rod 5, and the current from the generator 8' has energized the solenoid 3| to attract the contact 34 into engagement with the contact 35. The auxiliary valve i3 is held open by the spring l6 and the suction from the intake manifold I pulls the valve 23 into position to close the .port l2. When the accelerator draw rod 5 is released to partially close the throttle valve 4, as will be understood, the cir-, cuit making and breaking device 39 is closed by the contact 40. A circuit is thus closed from the battery 8 thru conductors 32 and 31 to one side of the solenoid l9 and from the other side of said solenoid thru conductor 38, circuit breaker 39 and contacts 35 and 34 to ground 36. The

solenoid I9 is thus energized to attract the core 22 thereof and move the valve 23 in a direction to open the port l2 and close the relief port 28, whereupon the suction in the manifold 1 creates a vacuum in the chamber 9' sufiicient to cause the blade I! and valve stem l5 to rotate against the tension of the spring l6 and rock said valve l3 to closing position. At this point the feed of fuel is completely out off while the engine is decelerating to idle speed. Obviously when the engine has reached its idle speed the current from the generator becomes weaker. The solenoid 3| is so designed that when the engine has reached its idle speed it is inoperative to attract the contact 34 under the charge of the generator 8', so that the circuit is broken when the engine has decelerated to its idle speed, as will be clear.

' Obviously, if the operator accelerates the engine thru the accelerator rod 5, the circuit will be broken by the circuit breaker 39. As soon as the circuit is broken at either point the suction in the intake manifold 1 again operates to close the port I 2 in a manner before described. The vacuum in the chamber '9' being broken thru the relief port 28, port 26, passage 25 and port 24, whereupon the valve stem l 5 and blade I! are returned by the spring IE to open the auxiliary valve I 3.'

If desired a relief port 4| may be suitably located in the casing 9 to relieve back pressure against return of the'blade l1.

What is claimed as new is:

1. In fuel control apparatus for internal combustion engines, the combination with a carburetor having a throttle valve, an accelerator mechanism for controlling the throttle valve, and an intake manifold, of a casing secured to the manifold and forming a chamber in which a vacuum is created by suction in said manifold, an auxiliary valve in said manifold operative by the vacuum in said chamber, and a valve in said chamber for breaking the vacuum therein and aoeaoit under the control of the accelerator mechanism.

2. In a fuel control mechanism for internal combustion engines, the combination with a carburetor having a throttle valve, accelerator mechanism for controlling said valve, an intake manifold, a battery, and a generator in circuit with the battery, and an auxiliary valve in said manifold, means for operating said valve by suction in said manifold, an electrically operative valve for controlling said means, and means for connecting said valve in circuit with said battery and generator and including circuit makers and breakers operative by said accelerator mechanism and fluctuations in the current generated by said generator, respectively.

3. In a fuel control apparatus for internal combustion engines, the combination with a carburetor having a throttle valve, an accelerator mechanism for controlling said valve, and an intake manifold, of a casing secured to the manifold and forming a chamber in which a vacuum is created by the suction in the manifold, an auxiliary valve in said manifold having a stem projecting into said chamber; for rotation therein, a vane on" said stem whereby the vane is rotated by the vacuum in the chamber, a valve in said chamber for breaking the vacuum therein, and electrical means for operating said valve under control of the accelerator mechanism.

4. In a fuel control apparatus for internal combustion engines, the combination with a carburetor having a throttle valve, an accelerator mechanism for controlling said valve, an intake manifold, and a generator, of an auxiliary valve in said manifold, means for operating said valve by suction in said manifold and including, a control valve movable in opposite directions to determine whether or not said suction shall be effective or ineffective, respectively, and operative in one direction by said suction, and electrical means for moving said control valve in the opposite direction under control of said accelerator mechanism, and generator.

5. In a fuel control apparatus for internal combustion engines, the combination with a carburetor having a throttle valve, an accelerator mechanism for controlling said valve, an intake manifold, and a generator, of an auxiliary valve in said manifold, means for operating said valve by suction in said manifold and including, a con- 

